GB1274155A - Electronic system for use in calculators - Google Patents
Electronic system for use in calculatorsInfo
- Publication number
- GB1274155A GB1274155A GB59054/70A GB5905470A GB1274155A GB 1274155 A GB1274155 A GB 1274155A GB 59054/70 A GB59054/70 A GB 59054/70A GB 5905470 A GB5905470 A GB 5905470A GB 1274155 A GB1274155 A GB 1274155A
- Authority
- GB
- United Kingdom
- Prior art keywords
- register
- adder
- fed
- digits
- data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
- G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
- G06F7/48—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
- G06F7/491—Computations with decimal numbers radix 12 or 20.
- G06F7/492—Computations with decimal numbers radix 12 or 20. using a binary weighted representation within each denomination
- G06F7/493—Computations with decimal numbers radix 12 or 20. using a binary weighted representation within each denomination the representation being the natural binary coded representation, i.e. 8421-code
- G06F7/494—Adding; Subtracting
- G06F7/495—Adding; Subtracting in digit-serial fashion, i.e. having a single digit-handling circuit treating all denominations after each other
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F15/00—Digital computers in general; Data processing equipment in general
- G06F15/02—Digital computers in general; Data processing equipment in general manually operated with input through keyboard and computation using a built-in program, e.g. pocket calculators
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Computing Systems (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Computational Mathematics (AREA)
- Pure & Applied Mathematics (AREA)
- Mathematical Optimization (AREA)
- Mathematical Analysis (AREA)
- Computer Hardware Design (AREA)
- Complex Calculations (AREA)
- Calculators And Similar Devices (AREA)
Abstract
1,274,155. Digital calculator. OMRON TATEISI ELECTRONICS CO. 11 Dec., 1970 [15 Dec., 1969], No. 59054/70. Heading G4A. Digital calculator using binary coded decimal digits obtains the nines complements of digits for use in subtraction by using an inverter fed by an adder receiving a digit to be complemented and pulses representing the digits + 5 and + 1. The calculator has shift registers 1, 2, 3 each holding the same number of digits, i.e. 12 digits each of 4 bits. Registers 1 and 2 are coupled in series by gates and register 2 feeds an adder 5 via gates. Register 3 feeds the adder and can receive data from the adder directly or via an inverter 31 and from register 2. Each register can circulate data and register 1 can receive data from a keyboard. A four bit register 4 can be used to shift data to the left or most significant position and a four bit stage 26 of register 2 can be used to shift data to the right. To obtain a nines complement data from register 3 is fed to the adder and pulses representing binary 5 are fed to the adder. For all but the least significant digit a pulse representing binary 1 is also fed to the adder. The sum is fed to inverter 31. Multiplication and division can be performed by successive addition or subtraction.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP44101159A JPS5036542B1 (en) | 1969-12-15 | 1969-12-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1274155A true GB1274155A (en) | 1972-05-17 |
Family
ID=14293252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB59054/70A Expired GB1274155A (en) | 1969-12-15 | 1970-12-11 | Electronic system for use in calculators |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3707622A (en) |
| JP (1) | JPS5036542B1 (en) |
| DE (1) | DE2060590A1 (en) |
| FR (1) | FR2073721A5 (en) |
| GB (1) | GB1274155A (en) |
| ZA (1) | ZA708435B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5235264B2 (en) * | 1971-09-29 | 1977-09-08 | ||
| GB1415322A (en) * | 1971-12-21 | 1975-11-26 | Omron Tateisi Electronics Co | Data processing device |
| JPS5219746B2 (en) * | 1971-12-24 | 1977-05-30 | ||
| FR2291542A1 (en) * | 1974-01-07 | 1976-06-11 | Cii | CHARACTER OPERATOR WORKING IN BINARY DECIMALS |
| GB1510588A (en) * | 1975-06-02 | 1978-05-10 | Polsky J | Sequential computing system |
| US7071908B2 (en) | 2003-05-20 | 2006-07-04 | Kagutech, Ltd. | Digital backplane |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL227350A (en) * | 1957-04-30 | |||
| US3249745A (en) * | 1962-01-09 | 1966-05-03 | Monroe Int | Two-register calculator for performing multiplication and division using identical operational steps |
| US3551663A (en) * | 1965-04-15 | 1970-12-29 | Gen Electric | Multiplication apparatus in a data processing system with a variable length multiplier |
| US3564226A (en) * | 1966-12-27 | 1971-02-16 | Digital Equipment | Parallel binary processing system having minimal operational delay |
| US3564222A (en) * | 1968-07-01 | 1971-02-16 | Bendix Corp | Digital function generator solving the equation f(x) {32 {0 mx {30 {0 b |
-
1969
- 1969-12-15 JP JP44101159A patent/JPS5036542B1/ja active Pending
-
1970
- 1970-12-09 DE DE19702060590 patent/DE2060590A1/en active Pending
- 1970-12-11 GB GB59054/70A patent/GB1274155A/en not_active Expired
- 1970-12-14 FR FR7044985A patent/FR2073721A5/fr not_active Expired
- 1970-12-14 ZA ZA708435A patent/ZA708435B/en unknown
- 1970-12-14 US US97883A patent/US3707622A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| ZA708435B (en) | 1971-09-29 |
| FR2073721A5 (en) | 1971-10-01 |
| JPS5036542B1 (en) | 1975-11-26 |
| DE2060590A1 (en) | 1971-06-24 |
| US3707622A (en) | 1972-12-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |